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2014/10/15 ¤U¤È 10:08:39
iphone Programming Glossary: explanationReading MP3 information using objective c http://stackoverflow.com/questions/1239460/reading-mp3-information-using-objective-c property of an audio file using the AudioFileGetProperty function of the AudioToolbox framework. A detailed explanation is available at iphonedevbook.com edit Original link is now down. InformIT has some similar sample code but it's not as..
http://stackoverflow.com/questions/2032826/property-synthesize @synthesize Why you are @synthesize and @property things on Xcode What is the explanation in really simple terms iphone share improve this question You asked for simple terms @property declares a property..
iPad/iPhone browser crashing when loading images in Javascript http://stackoverflow.com/questions/2986039/ipad-iphone-browser-crashing-when-loading-images-in-javascript halt all JS exectution. But after resetting src I ve been able to load in instances of the image over 170 times. An explanation of how the code works is below as well. var strImagePath http path to your gigantic image.jpg var arrImages var imgActiveImage..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received objective c ios xcode cocoa touch share improve this question From your description I suspect the most likely explanation is that you have some error in your memory management. You said you've been working on iPhone development for a few weeks..
Cocoa Touch - Comparing Images http://stackoverflow.com/questions/3400707/cocoa-touch-comparing-images images are in the buffers. You can then loop through manually or memcmp to check for differences. Apple's own detailed explanation and sample code around creating bitmap contexts and drawing into them is here http developer.apple.com iphone library documentation..
http://stackoverflow.com/questions/4097044/pdf-search-on-the-iphone values but I've been reading the spec for hours... it's a bloated mess and I'm going insane. Anyone with a practical explanation Update User Naveen Thunga found PDFKitten a framework for extracting data from PDFs in iOS . I just tried the demo and it..
How do I register a custom filetype in iOS http://stackoverflow.com/questions/4186401/how-do-i-register-a-custom-filetype-in-ios share improve this question I hope it's okay if I dump in that part of my projects info.plist without much further explanation. I think it's pretty much self explanatory. key CFBundleDocumentTypes key array dict key CFBundleTypeIconFiles key array..
What happens to JavaScript code after app is compiled using Titanium Mobile http://stackoverflow.com/questions/4217551/what-happens-to-javascript-code-after-app-is-compiled-using-titanium-mobile though that accurately explains how Phonegap works . Jeff's answer linked in the question is a technically correct explanation of how Titanium works but here's the best version I've heard so far from Marshall Culpepper It's true that Titanium Mobile..
Grand Central Dispatch (GCD) vs. performSelector - need a better explanation http://stackoverflow.com/questions/5225130/grand-central-dispatch-gcd-vs-performselector-need-a-better-explanation Central Dispatch GCD vs. performSelector need a better explanation I've used both GCD and performSelectorOnMainThread waitUntilDone in my apps and tend to think of them as interchangeable..
iOS: Movement Precision in 3D Space http://stackoverflow.com/questions/5550453/ios-movement-precision-in-3d-space the accelerometer values twice you get position but the error is horrible. It is useless in practice. Here is an explanation why Google Tech Talk at 23 20. What you actually could do is to discover your hidden object by changing the orientation..
OpenGL Texture Coordinates in Pixel Space http://stackoverflow.com/questions/5879403/opengl-texture-coordinates-in-pixel-space share improve this question This has been asked a few times but I don't have the links at hand so a quick and rough explanation. Let's say the texture is 8 pixels wide 0 1 2 3 4 5 6 7 ^ ^ ^ ^ ^ ^ ^ ^ ^ 0.0 1.0 0 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 8..
Example or explanation of Core Data Migration with multiple passes? http://stackoverflow.com/questions/5995231/example-or-explanation-of-core-data-migration-with-multiple-passes or explanation of Core Data Migration with multiple passes My iPhone app needs to migrate its core data store and some of the databases.. hints in their documentation . It's actually very easy but a long way to go before it's obvious. I'll illustrate the explanation with an example. The initial situation is this Data Model Version 1 It's the model you get when you create a project with..
Why is autorelease especially dangerous/expensive for iPhone applications? http://stackoverflow.com/questions/613583/why-is-autorelease-especially-dangerous-expensive-for-iphone-applications autorelease especially dangerous expensive for iPhone applications I'm looking for a primary source or a really good explanation to back up the claim that the use of autorelease is dangerous or overly expensive when writing software for the iPhone...
Distance moved by Accelerometer http://stackoverflow.com/questions/6645126/distance-moved-by-accelerometer position by integrating the linear acceleration twice but the error is horrible. It is useless in practice. Here is an explanation why Google Tech Talk at 23 20. I highly recommend this video. However the gyro mouse might work for your application see..
Customize the MKAnnotationView callout http://stackoverflow.com/questions/8018841/customize-the-mkannotationview-callout custom annotation view to pin on location updates which in turn is based in a blog post from Asynchrony Solutions. For explanation purposes here is some UML from a forked project This is a big hack but also the cleanest way I've seen to implement custom..
What's the best way to use Obj-C 2.0 Properties with mutable objects, such as NSMutableArray? http://stackoverflow.com/questions/816720/whats-the-best-way-to-use-obj-c-2-0-properties-with-mutable-objects-such-as-ns
UILabel - string as text and links http://stackoverflow.com/questions/8839464/uilabel-string-as-text-and-links I make these text links perform some action like navigation to different screen or making a call. Let me know if more explanation is required. iphone ios nsstring uilabel share improve this question You can add custom actions to any of the available..
Secure https encryption for iPhone app to webpage http://stackoverflow.com/questions/9181186/secure-https-encryption-for-iphone-app-to-webpage
Objective C - Remove last character from string http://stackoverflow.com/questions/1082178/objective-c-remove-last-character-from-string doing this in just one line of code you could write it as string string substringToIndex string.length string.length 0 Explanation of fancy one line code snippet If there is a character to delete i.e. the length of the string is greater than 0 string.length..
http://stackoverflow.com/questions/10909226/how-to-hide-iad iAD. but this method is still not working in my code. Any sample or how this method works void cancelBannerViewAction Explanation A banner view action can cover your application ™s user interface. However your application continues to run and receives..
phonegap background service in iOS5 http://stackoverflow.com/questions/11191139/phonegap-background-service-in-ios5 task to run more than a specific time limit. Similar Post iPhone background task stops running at some point Explanation http www.macworld.com article 1164616 how_ios_multitasking_really_works.html The reasonable solution would be to implement..
Unable to start my application in full screen on iPhone 6.0 Simulator Retina 4 Inch http://stackoverflow.com/questions/12508861/unable-to-start-my-application-in-full-screen-on-iphone-6-0-simulator-retina-4-i #7 Auto resizing options which are set This auto resizing option is set for all my UIViews and it's elements. edit #8 Explanation of Full Screen at Launch option MainWindow.xib properties. iphone ios ios simulator ios6 share improve this question..
Instruments ObjectAlloc: Explanation of Live Bytes & Overall Bytes http://stackoverflow.com/questions/2154219/instruments-objectalloc-explanation-of-live-bytes-overall-bytes ObjectAlloc Explanation of Live Bytes Overall Bytes I'm using Instument's ObjectAlloc tool in an attempt to understand what the memory my application..
Install Xcode 3.2.4, get “Base SDK Missing” http://stackoverflow.com/questions/3677487/install-xcode-3-2-4-get-base-sdk-missing share improve this question The Problem iOS SDK 4.0 is gone in this release replaced by iOS SDK 4.1. Details in The Explanation below. NB this repeats some information in my previous Q A regarding 3.2.3 . The Fix To fix this specific problem you need.. the lowest version you want to support. Note that support for 2.x versions through the app store is deprecated. The Explanation iOS SDK 4.0 is gone in this release replaced by iOS SDK 4.1. This is very similar with what happened with the 3.2.3 upgrade..
Quick Explanation of SUBQUERY in NSPredicate Expression http://stackoverflow.com/questions/3810992/quick-explanation-of-subquery-in-nspredicate-expression Explanation of SUBQUERY in NSPredicate Expression There appears to be zero documentation about the SUBQUERY keyword from Apple and..
iPhone: Get warning when battery power is very low http://stackoverflow.com/questions/4677515/iphone-get-warning-when-battery-power-is-very-low myDevice UIDevice currentDevice myDevice setBatteryMonitoringEnabled YES float batteryLevel myDevice batteryLevel Explanation from the docs batteryLevel The battery charge level for the device. read only @property nonatomic readonly float batteryLevel..
NSRegularExpression to validate URL http://stackoverflow.com/questions/4738521/nsregularexpression-to-validate-url something Any ideas I have tried John Gruber's regex also but it fails with some invalid URLs. Regular Expression Explanation of expression ^ match at the beginning Protocol identifier https ftp http https or ftp optional User Pass authentication..
Explanation of MProtect Errno 12 (ENOMEM) http://stackoverflow.com/questions/5389947/explanation-of-mprotect-errno-12-enomem of MProtect Errno 12 ENOMEM I'm writing an iPhone application using Monotouch and recently the app has started crashing..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown SEL selector NSSelectorFromString @ someMethod void id SEL _controller methodForSelector selector _controller selector Explanation What's going on here is you're asking the controller for the C function pointer for the method corresponding to the controller...
received memory warning. level 1 http://stackoverflow.com/questions/7088853/received-memory-warning-level-1 setHidden YES Description. NSString des theQuiz objectAtIndex row 6 NSString destext NSString alloc initWithFormat @ n Explanation n @ n n des Description UILabel alloc initWithFrame CGRectMake 40 400 rightans.frame.size.height 690 150 autorelease Description.numberOfLines..
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